Answer: 20m per second
Explanation:
There are 1000 m in a km. This means that the bus is moving at a speed of 72000 m/hr.
There are 60 minutes in an hour. To find the speed per minute, you would divide both sides by 60.
(72000/60)m per (60/60)minute
1200 m per minute
There are 60 seconds in a minute. To find the speed per minute, you would divide both sides by 60.
(1200/60)m per (60/60)second
20m per second